iOSview整体上移下移（点击键盘）

 1 - (void)textFieldDidBeginEditing:(UITextField *)textField
 2 {
 3     //设置动画的名字
 4     [UIView beginAnimations:@"Animation" context:nil];
 5     //设置动画的间隔时间
 6     [UIView setAnimationDuration:0.20];
 7     //??使用当前正在运行的状态开始下一段动画
 8     [UIView setAnimationBeginsFromCurrentState: YES];
 9     //设置视图移动的位移
10     self.view.frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y - 200, self.view.frame.size.width, self.view.frame.size.height);
11     //设置动画结束
12     [UIView commitAnimations];
13 }
14 - (void)textFieldDidEndEditing:(UITextField *)textField
15 {
16     //设置动画的名字
17     [UIView beginAnimations:@"Animation" context:nil];
18     //设置动画的间隔时间
19     [UIView setAnimationDuration:0.20];
20     //??使用当前正在运行的状态开始下一段动画
21     [UIView setAnimationBeginsFromCurrentState: YES];
22     //设置视图移动的位移
23     self.view.frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y +200, self.view.frame.size.width, self.view.frame.size.height);
24     //设置动画结束
25     [UIView commitAnimations];
26 }
27 - (BOOL)textFieldShouldReturn:(UITextField *)textField
28 {
29     [_text resignFirstResponder];
30     return YES;
31 }